JP2011125274A - Plant raising system - Google Patents

Abstract

A plant cultivation system capable of irradiating a plant with artificial light having an optimum wavelength component is provided.
A plant growth building, a growth surface on which plants are planted, a red LED, a blue LED, and a green LED, an LED unit disposed at a position facing the growth surface, and each color. Based on the current generation means 40 for generating an electric current to be applied to each of the LEDs, the plant growth state detection means 62 for detecting the plant growth level, and the information on the plant growth level detected by the plant growth state detection means 62, Voltage determining means for determining a voltage of a current applied to each color LED is provided.
[Selection] Figure 1

Description

  The present invention relates to a plant growing system for growing a plant with illumination light of an LED.

  In recent years, vegetable factories that grow vegetables with artificial light in a closed space are being built. Such a vegetable factory grows vegetables in a closed space without using soil, and therefore pathogens and pests do not enter. For this reason, it becomes possible to provide safe vegetables without the use of agricultural chemicals. However, since vegetables are grown with artificial light, there is a problem that the electricity bill becomes enormous, the production cost becomes high, and it is not profitable. In addition, since vegetables are grown with artificial light, there is a problem if extra carbon dioxide, which is a greenhouse gas, is discharged during power generation.

  Therefore, as shown in Patent Document 1, a lighting fixture for plant cultivation that uses an LED as illumination to save energy has been proposed. However, in the lighting fixture for plant cultivation shown in Patent Document 1, since a single color LED is used, wavelength components unnecessary for plant photosynthesis are also included, so that energy is wasted. was there. Therefore, as shown in Patent Document 2, an LED lamp has been proposed that uses LEDs of a plurality of colors having different emission wavelengths and irradiates wavelengths necessary for plant growth.

  By the way, it is known that the wavelength of light (color of light) required for plants changes with growth. Conventionally, the worker adjusted the wavelength component of the artificial light emitted from the LED lamp in accordance with the growth of the plant, so that there was a problem that labor costs were generated and profitability deteriorated. . Therefore, as shown in Patent Document 3, there has been proposed a plant cultivation system that performs lamp lighting control according to a preset schedule.

JP 2009-171904 A JP 2008-31188 A JP-A-10-191787

However, in the plant cultivation system shown in Patent Document 3, since the lighting control of the lamp according to the growth of the plant is not performed, when the growth of the plant is separated from the preset schedule for some reason, However, there was a problem that the growth of plants was delayed because artificial light having an optimal wavelength could not be irradiated.
An object of the present invention is to provide a plant cultivation system that can irradiate a plant with artificial light having an optimum wavelength component without solving the above-described problems.

The invention according to claim 1, which has been made to solve the above problems,
A plant breeding building that is a sealed space;
Arranged in the plant breeding building, a growing surface on which plants are planted,
An LED unit composed of a red LED, a blue LED, and a green LED, and disposed at a position facing the growth surface;
Current generating means for generating a current to be applied to each of the color LEDs;
Plant growth state detection means for detecting the growth level of the plant;
It has a voltage determination means for determining the voltage of the current applied to each of the color LEDs based on the information on the plant growth level detected by the plant growth state detection means.

The invention according to claim 2 is the invention according to claim 1,
Work instruction file storage means which is a nonvolatile storage device in which a work instruction file representing the relationship between the voltage of the current applied to each color LED of the LED unit and the elapsed time since the plant is planted on the growth surface is stored Have
The voltage determination means generates a work instruction file based on the information on the growth level of the plant detected by the plant growth state detection means,
The generated work instruction file is stored in the work instruction file storage area,
The current generation means refers to the work instruction file, and when the elapsed time after the plant has been planted on the growth surface reaches the elapsed time of the work instruction file, the voltage corresponding to the elapsed time. Thus, a current is applied to each color LED.
As a result, even if the voltage determining means does not operate for some reason, the current generating means applies to each color LED by referring to the work instruction file stored in the nonvolatile storage device. An electric current can be generated, and the plant planted on the plant growing surface does not wither or grow slowly.

The invention according to claim 3 is the invention according to claim 1,
The current generating means is disposed in the vicinity of each LED unit,
The work instruction file storage means is disposed in the vicinity of the current generation means,
The voltage determining means transmits the generated work instruction file to each work instruction file storage means for storage.
As a result, even when communication between the voltage determination unit and the work file storage unit is interrupted, the current generation unit refers to the work instruction file stored in the nonvolatile storage device, thereby A current applied to the LED can be generated.
Moreover, since the current generation means is disposed in the vicinity of each LED unit, it is possible to reduce energy waste by avoiding current loss due to long-distance power transmission.

The invention according to claim 4 is the invention according to claims 1 to 3,
The voltage determining means is
The relationship between the kind of plant planted on the growing surface, the growth level of the plant, the optimum voltage of the current applied to each color LED of the LED unit at each growth level, and the irradiation time of the LED unit at each growth level is shown. A reference schedule file storage means for storing a reference schedule file;
Plant growth state determination means for determining whether or not there is a change in the growth level detected by the plant growth detection means;
The work instruction file generating means for generating a work instruction file representing the relationship between the voltage of the current applied to each color LED of the LED unit and the elapsed time after the plant is planted on the growing surface,
If a work instruction file has not been generated for the growth surface, the work instruction file generation means creates a work instruction file based on the reference schedule file,
On the other hand, when the work instruction file is generated for the growth surface, and the plant growth state determination means determines that there has been a change in the growth level, the work instruction file generation means, In the work instruction file, change the item of elapsed time corresponding to the changed growth level to the elapsed time of change of the growth level, and sequentially change the item of elapsed time corresponding to the next and subsequent growth levels. , Perform a process of changing only the difference of the changed elapsed time,
The current generation means refers to the work instruction file, and when the elapsed time after the plant has been planted on the growth surface reaches the elapsed time of the work instruction file, the voltage corresponding to the elapsed time. Thus, a current is applied to each color LED.
Thereby, the optimal voltage applied to each color LED is determined accurately, and the optimal irradiation light suitable for the growth level of the plant is irradiated.

The invention according to claim 5 is the invention according to claims 1 to 4,
The plant growth state detection means is a plurality of sensors arranged in the height direction for detecting the height of a plant planted on the growth surface.
This makes it possible to easily and reliably detect the growth level of the plant planted on the growing surface, improve the reliability of the plant growing system, and detect the plant growing state at low cost. Means can be realized.

The invention according to claim 6 is the invention according to claims 1 to 5,
Solar cells that convert sunlight into current;
A secondary battery that stores the current generated by the solar battery,
A current is supplied from the secondary battery to the current generating means.
Thereby, it becomes possible to reduce the electricity bill accompanying electric power generation, and also the carbon dioxide which is a greenhouse gas accompanying electric power generation is not discharged excessively.

The invention according to claim 7 is the invention according to claim 6,
A remaining amount detection unit for measuring the remaining amount of the secondary battery;
A rectifying unit for stepping down, rectifying and smoothing alternating current supplied from a commercial power source;
When the remaining amount of the secondary battery measured by the remaining amount detection unit is equal to or less than a predetermined value, the power management unit activates the rectification unit and switches the current supplied to the current generation unit from the solar cell to the commercial power source. It further has these.
Thereby, even when the remaining amount of the secondary battery becomes equal to or less than a predetermined value during bad weather or at night, the current can be supplied to the LED unit, and the plant planted on the plant growing surface Will not wither or slow down.

The invention according to claim 8 is the invention according to claim 6 or claim 7,
While having a plurality of growth surfaces and LED units, it has a plurality of current generating means corresponding to each LED unit,
It has the some solar cell corresponding to each electric current production | generation means, It is characterized by the above-mentioned.
Thereby, it becomes possible to maintain a solar cell panel sequentially by temporarily stopping operation of a certain solar cell panel.

The invention according to claim 9 is the invention according to claims 1 to 8,
It further has an entry / exit detection means for detecting the entry / exit of the worker into the plant breeding building,
When the entrance / exit detection means detects the entry of the worker into the plant breeding building, the voltage determination means determines the voltage of the current applied to each color LED such that the LED unit emits white light,
When the entry / exit detection means detects the worker leaving the plant growth building, the voltage determination means is again based on the information detected by the plant growth state detection means, the red LED, blue LED, green It is characterized by determining the voltage of the current applied to each of the LEDs.
Thereby, when an operator enters the plant growing building, the LED unit emits white light, so that various checking operations of the worker in the plant growing building are facilitated. For example, it becomes easy to confirm the coloring of the plant planted on the growing surface. In addition, the operator does not feel discomfort and can work in the plant breeding building.

  According to the present invention, the growth level of the plant is detected, and the voltage of the current applied to each color LED is determined based on the growth level, so that it is optimum to match the growth level of the plant without taking time and effort. Therefore, it is possible to grow the plant in a shorter period without delaying the growth of the plant.

It is a schematic diagram of a plant breeding system. It is a block diagram of a plant breeding system. It is a drive circuit diagram of an LED unit. (Red LED) It is a drive circuit diagram of an LED unit. (Blue LED, Green LED) It is a graph showing the emission spectrum distribution of each color LED. It is a block diagram of a cultivation surface control part. It is a graph showing the absorption spectrum distribution of chlorophyll. It is a flowchart of a main process. It is a flowchart of a sensor data check process. It is a flowchart of an illumination color change process. It is a figure showing sensor data. It is a figure showing a plant growth file. It is a figure showing a standard schedule file. It is a figure showing a work instruction file. It is a figure showing the update state of the work instruction file. It is a flowchart of a lighting process at the time of worker entrance.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a plant breeding building, which is a sealed space in order to prevent invasion of pathogenic bacteria, pests, and wind and rain. The plant growing building 1 has an entrance door 1a for an operator to enter and leave. The entrance door 1a is provided with an entrance detector 1b. The entrance detection unit 1b is, for example, a tag reader and is a device that reads an electronic tag (RFID (abbreviation of radio frequency identification)) worn by an operator. In the entrance detection unit 1b, the entry history of each worker into the plant breeding building 1 is detected.

  A growth surface 2 is disposed in the plant growth building 1. In the embodiment, a plurality of growing surfaces 2 are arranged in the plant growing building 1. Plants to be grown are planted on the growing surface 2. The growth surface 2 is automatically supplied with a fertilizer solution such as minerals necessary for plant growth. An LED unit 61 is disposed at a position facing each growth surface 2. In the example shown in FIG. 1, the growth surface 2 has one stage, but the growth surface 2 may have a multistage structure in a shelf shape.

The LED unit 61 is composed of a large number of LEDs, each of a red LED that emits red light, a blue LED that emits blue light, and a green LED that emits green light.
FIG. 3 shows a drive circuit diagram of a red LED, and FIG. 4 shows a drive circuit diagram of a blue LED and a green LED. As shown in FIG. 3, a plurality of red LEDs 65a are connected in series (12 in the embodiment of FIG. 3). In parallel with the red LEDs 65a connected in series, a plurality of Zener diodes 66 are connected in series in the opposite direction to the red LEDs 65a. In the embodiment of FIG. 3, one zener diode 66 is connected in parallel to the two red LEDs 65a. With this configuration, when the current applied to the red LED 65a exceeds the maximum allowable current, the current exceeding the maximum allowable current flows to the Zener diode 66 connected in parallel with the red LED 65a, and flows to the red LED 65a. The flowing current value can be maintained within the maximum allowable current value, and the red LED 65a can be protected. As shown in FIG. 3, a plurality of red LEDs 65a connected in series and a plurality of Zener diodes 66 connected in series are connected in parallel. With such a configuration, even if a certain red LED 65a is damaged and one directly connected red LED 61a is turned off, the other red LEDs 65 connected in parallel with the turned off red LEDs 65a are not turned off. Plants planted on the growing surface 2 do not wither.
As shown in FIG. 4, the drive circuit for the blue LED 65b and the drive circuit for the green LED 65c are the same as the drive circuit for the red LED 65a shown in FIG. In the embodiment shown in FIG. 4, eight blue LEDs 65b and green LEDs 65c are connected in series.
In addition, since the number of each color LED connected in series depends on the characteristic of each color LED, it is not limited to embodiment of FIG. 3 and FIG.

  FIG. 5 shows the emission spectrum distribution of each color LED. As shown in FIG. 5, the emission peak of the red LED is 660 nm, and the red LED emits light in the range of 600 to 700 nm. The emission peak of the green LED is 525 nm, and the green LED emits light in the range of 460 to 600 nm. The emission peak of the blue LED is 470 nm, and the blue LED emits light in the range of 420 to 530 nm. The illuminance of each color LED changes according to the applied voltage.

  In the vicinity of each LED unit 61, a growth surface control unit 40 is disposed. The growth surface control unit 40 includes a pulse current generation unit 45 that supplies a pulse current to each color LED of the LED unit 61 in the vicinity (shown in FIG. 2). In addition, since the length of the conducting wire connecting the pulse current generator 45 and each LED unit 61 is within 2 m, the pulse current generated by the pulse current generator 45 is supplied to the LED unit 61 without being attenuated. .

  A plant growth state detection sensor 62 (plant growth state detection means) is provided on each growth surface 2. The plant growth state detection sensor 62 is a sensor that detects the “growth level” (growth state) of a plant planted on the growth surface 2. In the present embodiment, the plant growth state detection sensor 62 is a sensor that detects the height of a plant planted on the growth surface 2, and a plurality of height directions are arranged at lateral positions of the growth surface 2. The sensor includes a photoelectric sensor and an ultrasonic sensor. As described above, when the plant growth state detection means is configured, the plant growth state detection sensor 62 has a simple structure and is therefore reliable, and the “growth level” of the plant planted on the growth surface 2 at a low cost. It is possible to realize a plant growth state detecting means for detecting "".

  Reference numeral 10 denotes a control unit. The control unit 10 is connected to the growth surface control unit 40 in the vicinity of each LED unit 61. The control unit 10 is a device that determines the voltage of the current applied to each color LED of each LED unit 61 according to the “growth level” of the plant planted on the growth surface 2 detected by the plant growth state detection sensor 62. . The control unit 10 transmits information on the voltage of the current applied to each color LED of the determined LED unit 61 (a “work instruction file” described later) to each growth surface control unit 40. With this configuration, only the voltage information ("work instruction file") of the current applied to each color LED is transmitted from the control unit 10 to each control unit 40, and the pulse current in the vicinity of the LED unit 61 is transmitted. Since a pulse current is generated by the generation unit 45 and the pulse current is applied to the LED unit 61, power transmission does not take a long distance, and attenuation of the pulse current during power transmission can be avoided. Note that an operation computer device 21 is connected to the control unit 10.

  A buzzer 63 is disposed on each growing surface 2. An imaging device 64 that images the growth surface 2 is disposed on each growth surface 2. The imaging device 64 includes an image sensor, an imaging optical system, and an image generation circuit. The image sensor has photodiodes arranged two-dimensionally. Each photodiode converts the intensity of incident light into an electric charge, and outputs the electric charge as a “signal voltage”. The image sensor includes a charge coupled device image sensor (CCD) and a complementary metal oxide semiconductor (CMOS). The imaging optical system is composed of a single lens or a plurality of lenses, and forms an incident image on an image sensor. The image generation circuit includes an A / D converter and a DSP (Digital Signal Processor). The A / D converter converts the “signal voltage” output from the image sensor into a “digital signal”. The DSP generates “captured image data” that is two-dimensional pixel data from the “digital signal” generated by the A / D converter.

  On the ceiling of the plant growing building 1, a solar cell panel 51 is disposed. The solar cell panel 51 is arranged to be inclined 25 ° to 35 ° from the horizontal plane in the south direction. The solar cell panel 51 includes silicon (including polycrystalline silicon, microcrystalline silicon, and amorphous silicon), compound (including GaAs and CIS), and organic (including dye-sensitized and organic thin film types). Solar panel). When the solar cell panel 51 is irradiated with sunlight, light energy is converted into current by the photovoltaic effect.

  The solar cell panel 51 is connected to the charge controller 52. The charge controller 52 is connected to the secondary battery 53. The charge controller 52 has an overcharge prevention circuit so that the overcharge of the secondary battery 53 is prevented. In addition, the charge controller 52 has an overcurrent prevention circuit so that application of overcurrent to the secondary battery 53 is prevented. The secondary battery 53 includes a secondary battery using a chemical reaction such as a lithium ion battery, a nickel metal hydride battery, or a lead storage battery. The secondary battery 53 includes a remaining amount detection unit 53 a (shown in FIG. 2) that detects the remaining amount based on the voltage of the secondary battery 53. In the present embodiment, the current generated by the solar cell panel 51 is used for light emission of the LED unit 61. Thus, since the electric current produced | generated with the solar cell panel 51 was used for the light emission of the LED unit 61, an electricity bill does not become enormous and production cost can be reduced. Moreover, the carbon dioxide which is a greenhouse gas is not discharged extra. As shown in FIG. 1, in this embodiment, one solar cell panel 51 is connected to one growth surface control unit 40.

  The rectification unit 71 includes a transformer, a rectification circuit, and a smoothing circuit. The rectification unit 71 steps down the alternating current supplied from the commercial power supply 99 and converts it into direct current, and outputs the direct current to the pulse current generation unit 45. The transformer steps down the alternating current supplied from the commercial power supply 99 to, for example, 24 v alternating current. The rectifier circuit is composed of a diode or the like, and full-wave rectifies the alternating current stepped down by the transformer. The smoothing circuit is composed of a capacitor or the like, and smoothes the current that has been full-wave rectified by the rectifier circuit. In the present embodiment, the commercial power supply 99 of 100 V or 200 V, 50 Hz or 60 Hz is converted to 24 V DC.

(Explanation of block diagram of plant breeding system)
The control unit 10 includes a CPU 11, a RAM 12, a ROM 13, an auxiliary storage device 14, and a communication interface 15, which are connected to each other via a bus 19.

The CPU 11 performs various calculations and processes in cooperation with the RAM 12 and the ROM 13.
The RAM 12 temporarily stores a program processed by the CPU 11 and data processed by the CPU 11 in its address space.

  Various programs are stored in the ROM 13. The ROM 13 stores a power management program 13a, a sensor data acquisition program 13b, a plant growth state determination program 13c, a work instruction file generation program 13d, an LED lighting control program 13e, an inspection request program 13f, and an entrance / exit management program 13g. . The various programs are processed by the CPU 11, thereby realizing various functions of the plant growing system 100.

The power management program 13a is a program for performing a process of switching the current applied to the LED unit 61 from the solar battery panel 51 to the commercial power source 99 when the remaining amount of the secondary battery 53 becomes a predetermined value or less.
The sensor data acquisition program 13 b is a program for acquiring “sensor data” detected by each plant growth state detection sensor 62.
The plant growth state determination program 13c is a program for determining the growth level of the plant planted on each growth surface 2 based on the acquired “sensor data”.
The work instruction file generation program 13d is a program for generating or updating a “work instruction file”.
The LED lighting control program 13e controls the voltage of the pulse current applied to each color LED of the LED unit 61 of each growth surface 2 by transmitting a “work instruction file” to the growth control unit 40 of each growth surface 2. It is a program.
The inspection request program 13f is a program for notifying the operator that the inspection of the growing surface 2 is necessary when the growth of the plant planted on the growing surface 2 is separated from the “reference schedule” described later. It is. Specifically, the inspection request program 13 f displays a warning on the operation computer device 21 or sounds a warning sound with the buzzer 63 installed on the breeding surface 2.
The entrance / exit management program 13g is a program that generates “entrance / exit history” from the entrance / exit information of each worker detected by the entrance detector 1b to the plant breeding building 1 and stores it in the entrance / exit history recording area 14e. .
Each program may be realized as an ASIC (Application Specific Integrated Circuit).

The auxiliary storage device 14 is, for example, a nonvolatile memory or a hard disk. The auxiliary storage device 14 has a sensor data storage area 14a, a plant growth history file storage area 14b, a reference schedule file storage area 14c, a work instruction file storage area 14d, and an entrance / exit history storage area 14e.
“Sensor data” is stored in the sensor data storage area 14a. As shown in FIG. 11, the “sensor data” is data in which information on the height of the plant planted on each growth surface 2 detected by each plant growth state detection sensor 62 is stored as a “growth level”. . The “growth level” is the number detected by a plurality of plant growth state detection sensors 62 arranged in the height direction, and corresponds to the height of the plant planted on the growth surface 2.
A “plant growth history file” is stored in the plant growth history file storage area 14b. As shown in FIG. 12, the “plant growth history file” is a file representing the relationship between the “growth level” planted on each growth surface 2 and the “elapsed time” at which the “growth level” was reached. It is.

  A “reference schedule file” is stored in the reference schedule file storage area 14c. As shown in FIG. 13, the “reference schedule file” includes the types of plants planted on the growth surface 2, “growth levels”, optimum voltages of currents applied to the respective color LEDs at each “growth level”, It is the file showing the relationship with the irradiation time of the LED unit 61 in "growth level". The “reference schedule file” can be set or changed by the operation computer device 21, and the voltage of the current applied to each color LED optimal for the growth of the plant planted on the growth surface 2 is set. FIG. 7 shows a graph showing the absorption spectrum distribution of chlorophyll. As shown in FIG. 7, chlorophyll hardly absorbs light in the green to yellow wavelength region, and hardly synthesizes light in this wavelength region. As is apparent from FIGS. 5 and 7, the light absorption distribution of chlorophyll almost coincides with the light emission distribution of the blue LED and the light emission distribution of the red LED. In the present invention, a “reference schedule file” is set based on this knowledge. That is, the blue LED and the red LED are made to emit light strongly in the growth process of the plant planted on the growing surface 2. Note that the reason why the green LED emits light at the growth level 0 (germination stage) is based on the knowledge that green light is necessary at the time of germination. Further, the fact that the green LED is caused to emit light at the growth level 3 (final growth period) is based on the knowledge that the green light is necessary even at the final growth period.

  The “work instruction file” is stored in the work instruction file storage area 14d. As shown in FIG. 14, the “work instruction file” includes the voltage of the current applied to each color LED and the “elapsed time” after the plant is planted on each growth surface 2 (after the seed has been planted). It is a file that represents the relationship. Each “elapsed time” item corresponds to each “growth level”. Each color LED of each LED unit 61 emits light according to a schedule based on the file. That is, when the “elapsed time” of the “work instruction file” is reached after the plant is planted on each growth surface 2, a voltage current corresponding to the “elapsed time” is applied to each color LED. .

  In the entrance / exit history storage area 14e, “entrance / exit history” generated by the entrance / exit management program 13g is stored.

  The communication interface 15 is connected to the entrance detection unit 1b, the breeding surface control unit 40, and the operation computer device 21. The communication interface 15 includes a LAN (Local Area Network), a USB (abbreviation of Universal Serial Bus), IEEE1394, RS232, RS422, and other communication interfaces. The operation computer device 21 has input means such as a pointing device such as a keyboard and a mouse, and a display screen. The operation computer device 21 is a device for an operator to operate the plant growing system 100. Instead of the operation computer device 21, operation means such as a touch panel may be connected to the communication interface 15.

  Below, the block diagram of the plant growth control part 40 is demonstrated using FIG. The plant growth control unit 40 includes a CPU 41, a RAM 42, a ROM 43, an auxiliary storage device 46, a communication interface 44, a pulse current generation unit 45, and an interface 47, which are connected to each other via a bus 49. The CPU 41 performs various calculations and processes in cooperation with the RAM 42 and the ROM 43. The RAM 42 temporarily stores programs processed by the CPU 41 and data processed by the CPU 41 in its address space. Various programs are stored in the ROM 43.

  The auxiliary storage device 46 is, for example, a nonvolatile memory or a hard disk (nonvolatile storage device). The auxiliary storage device 46 has a work instruction file storage area 46 a and stores a “work instruction file” transmitted from the control unit 10.

  The communication interface 44 is connected to the communication interface 15 of the control unit 10. The communication interface 44 is an interface corresponding to the communication interface 15 of the control unit 10.

The pulse current generator 45 generates a pulse current from the current supplied from the secondary battery 53 or the rectifier 71 and applies the pulse current to each color LED of the LED unit 61. The pulse current generator 45 generates a pulse current of a voltage based on the “work instruction file” stored in the work instruction file storage area 46a for each color LED. The pulse current generator 45 and the auxiliary storage device 46 are disposed in the vicinity of each other, and the distance between them is at least 2 m or less.
As described above, the pulse current is applied to the LED unit 61. When the plant grown on the growing surface 2 is a vegetable, the vitamin contained in the vegetable increases when the vegetable is irradiated with pulsed light. Because it does.

  The interface 47 is connected to a remaining amount detection unit 53a of the secondary battery 53, a rectification unit 71, a plant growth state detection sensor 62, a buzzer 63, and an imaging device 64. The interface 47 converts the physical / logical format of the data output from the remaining amount detection unit 53 a, the rectification unit 71, the plant growth state detection sensor 62, the buzzer 63, and the imaging device 64, and transfers the data to the bus 49. The interface 47 outputs a current for driving the buzzer 63.

(Description of main processing flow)
FIG. 8 shows a flowchart of the main process, and the flow will be described below. When the main process is started, in the process of S13 “sensor data acquisition”, the plant growth detection program 13b determines the “growth level” (height) of the plant planted on the growth surface 2 by each plant growth state detection sensor 62. A command to be detected is output to each plant growth control unit 40. Data detected by each plant growth state detection sensor 62 is output from each growth surface control unit 40 to the control unit 10 and stored in the plant growth data storage area 14 a of the auxiliary storage device 14. When the process of S13 ends, the process proceeds to the determination process of S14.

  In the determination process of S14 “secondary battery shortage?”, The secondary battery remaining amount detection program 13a determines whether the remaining amount of the secondary battery 53 detected by the remaining amount detection unit 53a is equal to or greater than a predetermined value. Whether or not the remaining amount of the secondary battery 53 is insufficient. When the secondary battery remaining amount detection program 13a determines that the remaining amount of the secondary battery 53 is insufficient, the process proceeds to S15. On the other hand, when the secondary battery remaining amount detection program 13a determines that the remaining amount of the secondary battery 53 is not insufficient, the process proceeds to S16.

  In the process of S15 “switch to commercial power”, the power management program 13a instructs the rectifier 71 to start the rectifier 71 in order to switch the power for driving the LED unit 61 from the solar battery panel 51 to the commercial power 99. Output. When the process of S15 ends, the process proceeds to S16. Thus, in this embodiment, when the secondary battery 53 runs short, it is decided to switch to the commercial power source 99. Therefore, the LED unit 61 does not remain in the off state, and the growth surface 2 as scheduled. It becomes possible to grow plants.

  In S <b> 16 “sensor data check process”, the plant growth state determination program 13 c checks the “sensor data” to determine the growth state of the plant planted on each growth surface 2. Then, the work instruction file generation program 13d updates the “work instruction file” based on the determined growth state, thereby setting the voltage value of the current applied to each color LED to an optimum voltage for plant growth. . Details will be described later with reference to FIG. When the process of S16 ends, the process proceeds to the determination process of S18.

  In S18 “illuminance changing process”, the LED lighting control program 13f changes the voltage of the current applied to each color LED and changes the illuminance of each color LED based on the “work instruction file”. Details will be described later with reference to FIG. When the process of S18 ends, the process proceeds to the determination process of S19.

  In the process of S19 “detection interval elapsed?”, The CPU 41 determines whether or not the detection interval by the plant growth state detection sensor 62 has elapsed, and if it is determined that the detection interval has elapsed, the CPU 41 proceeds to the process of S13. move on. That is, at each detection interval, the plant growth state detection sensor 62 detects in the process of S13. The detection interval is, for example, 1 hour.

(Sensor data check process)
FIG. 9 shows a flowchart of “sensor data check processing”, and the flow will be described below. When S16 “sensor data check process” starts, the process proceeds to S16-1 “plant growth history file acquisition” process. In the process of S16-1, the plant growth state determination program 13c refers to the plant growth history file storage area 14b, acquires the “plant growth history file” of the growth surface 2 for checking “sensor data”, and stores the storage area of the RAM 12. Remember me. When the process of S16-1 ends, the process proceeds to S16-2.

  In the process of S16-2 “acquisition of reference schedule file”, the plant growth state determination program 13c refers to the “reference schedule file” stored in the reference schedule file storage area 14c, and checks the “sensor data”. A “reference schedule file” corresponding to surface 2 is acquired and stored in the RAM 12. When the process of S16-2 ends, the process proceeds to S16-3.

  In the process of S16-3 “Elapsed time calculation”, the plant growth detection program 13b determines that “the progress has been made since the plant planted on the growth surface 2 for checking the“ sensor data ”has been planted (the seed has been planted). Time "is calculated. When the process of S16-3 ends, the process proceeds to the determination process of S16-4.

  In the determination process of S16-4 “Sensor data changed?”, The plant growth state determination program 13c refers to the RAM 12 and the sensor data storage area 14a, thereby the “plant growth history file” and the corresponding growth surface. 2 is compared to determine whether the “sensor data” has changed. If the plant growth state determination program 13c determines that the “sensor data” has changed, the process proceeds to the determination process of S16-5. If the plant growth state determination program 13c determines that the “sensor data” has not changed, the process proceeds to the determination process of S16-11. In addition, when a plant (seed) is planted on the growth surface 2 and the determination process of S16-4 is first performed, the process proceeds to S16-5.

In the process of S16-5 “update work instruction file”, the work instruction file generation program 13d refers to the “reference schedule file” stored in the reference schedule file storage area 14c, thereby “work instruction file” (FIG. 14) is executed, the “work instruction file update process” is executed.
In addition, when a plant (seed) is planted on the growth surface 2 and the determination process of S16-5 is first performed, the work instruction file generation program 13d reads the “reference” corresponding to the plant planted on the growth surface 2. A “work instruction file” is created based on the “schedule file”. Specifically, the work instruction file generation program 13d sequentially accumulates the “irradiation time” of each “growth level” of the “reference schedule file” corresponding to the plant planted on the growth surface 2 to thereby display each color LED. The “elapsed time” corresponding to the voltage of the current applied to the LED is sequentially calculated, and a “work instruction file” that is a schedule of the voltage of the current applied to each color LED is generated.
In addition, when a plant (seed) is planted on the growth surface 2 and the determination process of S16-5 is performed after the second time, a “work instruction file” that has already been generated (shown in FIG. 15A). ) Change the “elapsed time” corresponding to the “growth level” changed to “elapsed time” (the “elapsed time” calculated in the processing of S16-3) where the “sensor data” changed, Shift processing for sequentially shifting the “elapsed time” corresponding to the “growth level” after the next by the difference of the changed “elapsed time” is performed. In the example shown in FIG. 15, the “growth level” is 0 to 1 (scheduled) and the “elapsed time” is 120 h, but the “growth level” 1 actually detected by the sensor 62 has been reached. Since the “elapsed time” is 115 h, shift processing is performed to advance each “growth level” of the “work instruction file” by 5 h. When the process of S15-5 ends, the process proceeds to S16-6.

  In the process of S16-6 “Plant growth history file update”, the CPU 11 updates the “plant growth history file” (shown in FIG. 12) stored in the plant growth history file storage area 14b. Specifically, the CPU 11 stores the time when the “sensor data” has changed in the “elapsed time” corresponding to the changed “growth level”. When the process of S16-6 ends, the process proceeds to the determination process of S16-7.

  In the determination process of S16-7 “Plant growth reference data and separation”, the plant growth state determination program 13c determines that the growth of the plant planted on the growth surface 2 is the plant specified in the “reference schedule file”. Determine if you are separated from the growth schedule. Specifically, the plant growth state determination program 13c calculates the “growth level” (height) of the plant planted on the growth surface 2 calculated from the “sensor data”, and the “reference” corresponding to the plant. Refer to the schedule file, extract the "elapsed time" that has reached the "growth level" of the plant, compare the "elapsed time" and "elapsed time" when the "sensor data" has changed, It is determined whether or not the separation is greater than a predetermined (for example, 10% or more). When the plant growth state determination program 13c determines that the growth of the plant planted on the growth surface 2 is separated from the plant growth schedule defined in the “reference schedule file”, S16-8 Proceed to the process. On the other hand, when the plant growth state determination program 13c determines that the growth of the plant planted on the growth surface 2 is not separated from the plant growth schedule defined in the “reference schedule file”, The process proceeds to S16-9.

  In S16-8 “inspection request process”, the inspection request program 13f causes the operator to notify the operator that the inspection of the growth surface 2 determined in the determination process in S16-7 is necessary. Execute. Specifically, the inspection request program 13f outputs a command for causing the operation computer device 21 to display a warning screen or to reproduce a warning sound. In addition, the inspection request program 13f outputs a command for reproducing a warning sound with the buzzer 63 for a predetermined time (for example, 3 minutes) to the growing surface control unit 40 of the growing surface 2. Further, the inspection request program 13 f takes an image of the growth surface 2 with the imaging device 64 and outputs a command for outputting the “captured image” to the operation computer device 21 to the growth surface control unit 40. At this time, the LED lighting control program 13e applies each color LED to the pulse current generation unit 45 of the growth surface 2 so that the LED unit 61 disposed on the growth surface 2 to be imaged emits white light. A command to make the voltage of the pulse current to be substantially the same is output. Thus, since the LED unit 61 that irradiates the growth surface 2 is caused to emit white light at the time of imaging 2 of the growth surface 2, the growth surface 2 displayed on the screen of the operation computer device 21 is clearly displayed. The inspection of the operator's training surface 2 becomes easy. When the process of S16-8 ends, the process proceeds to the determination process of S16-9.

  In the determination process of S16-9 “Check sensor data on all growth surfaces?”, The plant growth state determination program 13c determines whether “sensor data” on all the growth surfaces 2 has been checked. When the plant growth state determination program 13c determines that the “sensor data” of all the growth surfaces 2 has been checked, the “sensor data check process” ends, and the determination of S17 “Is illuminance changed?” In FIG. Proceed to processing. On the other hand, if the plant growth state determination program 13c does not determine that the “sensor data” of all the growth surfaces 2 has been checked, the process returns to S16-1.

  The determination process of S16-11 “Plant growth reference data and separation?” Is the same as the process of S16-7. When the plant growth state determination program 13c determines that the growth of the plant planted on the growth surface 2 is separated from the plant growth schedule defined in the “reference schedule file”, S16-12 Proceed to the process. On the other hand, when the plant growth state determination program 13c determines that the growth of the plant planted on the growth surface 2 is not separated from the plant growth schedule defined in the “reference schedule file”, The process proceeds to S16-9.

  The process of S16-12 “inspection request process” is the same as the process of S16-8. When the process of S16-12 is completed, the process proceeds to the determination process of S16-9.

(Illuminance change processing)
FIG. 10 shows a flowchart of “illuminance change processing”, and the flow will be described below. When the “illuminance changing process” is started, the LED lighting control program 13e stores the “work instruction file” (shown in FIG. 14) of the growth surface 2 in the RAM 12 in the process of S18-1 “work instruction file read”. When the process of S18-1 is completed, the process proceeds to the determination process of S18-2.

  In the determination process of S18-2 “Is the work instruction file updated?”, The LED lighting control program 13e determines whether the “work instruction file” has been updated. If the LED lighting control program 13e determines that the “work instruction file” has been updated, the process proceeds to S18-3. On the other hand, if the LED lighting control program 13e determines that the “work instruction file” has not been updated, the process proceeds to the determination process of S18-4.

  In the processing of S18-3 “work instruction file transmission”, the LED lighting control program 13e transmits the “work instruction file” to the growth surface control unit 40 of the growth surface 2 in which the “work instruction file” has been changed. The breeding surface control unit 40 that has received the “work instruction file” stores the “work instruction file” in the work instruction file storage area 46 a of the auxiliary storage device 46. Then, the CPU 41 outputs a command for changing the voltage of the current applied to each color LED of the LED unit 61 to the pulse current generation unit 45 based on the “work instruction file” stored in the work instruction file storage area 46 a. . The pulse current generator 45 changes the voltage of the current applied to each color LED of the LED unit 61 based on the command. When the process of S18-3 ends, the process proceeds to the determination process of S18-4.

  In the determination process of S18-4 “Process for all growing surfaces?”, The LED lighting control program 13e determines whether or not the above-described processes of S18-1 to S18-3 have been performed for all the growing surfaces 2. . When the LED lighting control program 13e determines that the processes of S18-1 to S18-3 have been performed for all the growing surfaces 2, the “illuminance changing process” is finished, and the process of S19 shown in FIG. move on. On the other hand, when the LED lighting control program 13e determines that the processing of S18-1 to S18-3 is not performed for all the growing surfaces 2, the process returns to S18-1.

  As described above, in the present invention, plant growth (height) is detected by the plant growth state detection sensor 62, and the optimal irradiation light is irradiated in accordance with the plant growth level, so that plant growth is delayed. It became possible to grow plants in a shorter period of time.

Further, in the present invention, the control unit 10 generates a “work instruction file”, transmits the “work instruction file” to the growth surface control unit 40 of each growth surface 2, and each of the growth surface control units 40 performs the “work”. The instruction file ”is stored and retained, so that even when the control unit 10 fails or when communication between the control unit 10 and each growth surface control unit 40 is interrupted, the growth surface control unit 40 can supply a pulse current to the LED unit 61 based on the “work instruction file” held by itself, which is excellent in fault tolerance, and a plant planted on the growing surface 2 may wither. Absent.
In the present embodiment, one solar cell panel 51 is connected to one growth surface control unit 40. For this reason, the solar cell panel 51 can be sequentially maintained by temporarily stopping the operation of a certain solar cell panel 51.

(Lighting process when entering the worker)
FIG. 16 shows a flowchart of the “lighting process at worker entry”, and the process will be described below. In the determination process of S81 “Is the admission detection part detected the worker's admission?”, The admission / exit management program 13g determines whether the operator has entered the plant growth building 1 based on the signal output from the admission detection part 1b. If detected, the process proceeds to S82.

  In the determination process of S82 “turn the illumination light of the LED unit to white”, the LED lighting control program 13e causes the LED unit 61 disposed on each growth surface 2 to emit white light, so that the LED unit is white. The voltage of the current applied to each color LED that emits light is determined. If the number of LEDs of each color arranged in the LED unit unit 61 is the same and the illuminance of each LED is the same when the same voltage is applied to each LED, the LED lighting control program 13e is The voltage of the pulse current applied to each color LED is made substantially the same. Then, the LED lighting control program 13e outputs a command for setting the determined voltage to each pulse current generator 45. As described above, when the operator enters the plant growing building 1, each LED unit 61 emits white light, so that the operator can easily perform various checking operations in the plant growing building 1. For example, it becomes easy to confirm the coloring of the plant planted on the growing surface 2. Moreover, the operator can work in the plant breeding building 1 without feeling uncomfortable. When the process of S82 ends, the process proceeds to the determination process of S83.

  In the determination process of S83 “Is the entrance detection unit detected the worker leaving?”, The entrance / exit management program 13g detects the worker leaving the plant breeding building 1 based on the signal output from the entrance detection unit 1b. If detected, the process proceeds to S84.

  In the process of S84 “Release the illumination color of the LED unit from white”, the LED lighting control program 13e applies each pulse current generation unit 45 to each color LED to release the illumination color of each LED unit 61 from white. A command to cancel the command to make the voltage of the pulse current substantially the same is output. Then, each pulse current generator 45 generates a pulse current to be applied to each color LED with a voltage based on the “work instruction file” stored in the work instruction file storage area 46a. Thus, when the worker leaves the plant growth building 1, each pulse current generation unit 45 is a pulse applied to each color LED at a voltage based on the “work instruction file” stored in the work instruction file storage area 46a. Since the electric current is generated, the illumination light of the optimal illumination color for plant growth is irradiated to the plant planted on the growth surface 2, and the plant growth is not delayed. In addition, energy is not wasted. When the process of S84 ends, the process proceeds to the determination process of S81.

(Summary)
In the embodiment described above, a pulse current is applied to each color LED of the LED unit 61. However, a direct current may be applied to each color LED.
The LED unit 61 may be turned on for a predetermined time and then turned off for a predetermined time to reproduce day and night. In this case, vitamins and minerals contained in plants (vegetables) increase.

  In the embodiment described above, the plant growth state detection means for detecting the “growth level” of the plant planted on the growth surface 2 is the plant growth state detection sensor 62 disposed on the side of the growth surface 2. The imaging device 64 may be used as the plant growth state detection means. In this case, the growth surface 2 is imaged by the imaging device 64 to generate “nurturing surface imaging data”, and the plant growth state determination program 13c analyzes the “nurturing surface imaging data” to analyze the “planting surface imaging data”. "Growth level" is determined. Specifically, the plant growth state determination program 13c samples the intensity of the wavelength of the “growth plane imaging data” and analyzes the intensity of the sampled wavelength, thereby the “growth of the plant at the time of imaging”. "Level" is determined. Alternatively, the plant growth state determination program 13c performs pattern matching with the “growing surface imaging data” and “reference data” corresponding to each “growth level”, thereby determining the “growth level” of the plant at the time of imaging. It can be judged. In order to improve the determination accuracy of the “growth level”, when imaging the growth surface 2 with the imaging device 64, the voltage applied to each color LED is made substantially equal, and the LED unit 61 emits white light. Is preferred.

  Although the present invention has been described above in connection with the most practical and preferred embodiments at the present time, the present invention is not limited to the embodiments disclosed herein. However, it should be understood that changes can be made as appropriate without departing from the spirit or concept of the invention that can be read from the claims and the entire specification, and that a plant growing system involving such changes should also be included in the technical scope. I must.

DESCRIPTION OF SYMBOLS 1 Plant growth building 1a Entrance door 1b Entrance detection part 2 Raising surface 10 Control part 11 CPU
12 RAM
13 ROM
13a Power management program 13b Sensor data acquisition program 13c Plant growth state determination program 13d Work instruction file generation program 13e LED lighting control program 13f Inspection request program 13g Entrance / exit management program 14 Auxiliary storage device 14a Sensor data storage area 14b Plant growth history file storage Area 14c Reference schedule file storage area 14d Work instruction file storage area 14e Entrance / exit history storage area 15 Communication interface 16 Interface 19 Bus 21 Computer device for operation 22 Server 22a Plant growth data 40 Growth surface control section 41 CPU
42 RAM
43 ROM
44 Communication Interface 45 Pulse Current Generation Unit 46 Auxiliary Storage Device 46a Work Instruction File Storage Area 47 Interface 49 Bus 51 Solar Panel 52 Charge Controller 53 Secondary Battery 53a Remaining Capacity Detection Unit 61 LED Unit 62 Plant Growth State Detection Sensor 63 Buzzer 64 Imaging device 65a Red LED
65b Blue LED
65c Green LED
66 Zener diode

Claims (9)

A plant breeding building,
Arranged in the plant breeding building, a growing surface on which plants are planted,
An LED unit composed of a red LED, a blue LED, and a green LED, and disposed at a position facing the growth surface;
Current generating means for generating a current to be applied to each of the color LEDs;
Plant growth state detection means for detecting the growth level of the plant;
A plant growing system comprising voltage determining means for determining a voltage of a current applied to each of the color LEDs based on information on a plant growth level detected by the plant growing state detecting means. Work instruction file storage means which is a nonvolatile storage device in which a work instruction file representing the relationship between the voltage of the current applied to each color LED of the LED unit and the elapsed time since the plant is planted on the growth surface is stored Have
The voltage determination means generates a work instruction file based on the information on the growth level of the plant detected by the plant growth state detection means,
The generated work instruction file is stored in the work instruction file storage area,
The current generation means refers to the work instruction file, and when the elapsed time after the plant has been planted on the growth surface reaches the elapsed time of the work instruction file, the voltage corresponding to the elapsed time. The plant growing system according to claim 1, wherein an electric current is applied to each color LED. The current generating means is disposed in the vicinity of each LED unit,
The work instruction file storage means is disposed in the vicinity of the current generation means,
3. The plant growing system according to claim 2, wherein the voltage determining means transmits the generated work instruction file to each work instruction file storage means for storage. The voltage determining means is
Reference schedule file representing the relationship between the type of plant planted on the growing surface, the growth level of the plant, the voltage of the current applied to each color LED of the LED unit at each growth level, and the irradiation time of the LED unit at each growth level A reference schedule file storage means for storing
Plant growth state determination means for determining whether or not there is a change in the growth level detected by the plant growth detection means;
The work instruction file generating means for generating a work instruction file representing the relationship between the voltage of the current applied to each color LED of the LED unit and the elapsed time after the plant is planted on the growing surface,
If a work instruction file has not been generated for the growth surface, the work instruction file generation means creates a work instruction file based on the reference schedule file,
On the other hand, when the work instruction file is generated for the growth surface, and the plant growth state determination means determines that there has been a change in the growth level, the work instruction file generation means, In the work instruction file, change the item of elapsed time corresponding to the changed growth level to the elapsed time of change of the growth level, and sequentially change the item of elapsed time corresponding to the next and subsequent growth levels. , Perform a process of changing only the difference of the changed elapsed time,
The current generation means refers to the work instruction file, and when the elapsed time after the plant has been planted on the growth surface reaches the elapsed time of the work instruction file, the voltage corresponding to the elapsed time. The plant growing system according to any one of claims 1 to 3, wherein a current is applied to each color LED.   5. The plant growth state detection means is a plurality of sensors arranged in a height direction for detecting the height of a plant planted on the growth surface. 5. Plant breeding system. Solar cells that convert sunlight into current;
A secondary battery that stores the current generated by the solar battery,
The plant growing system according to claim 1, wherein a current is supplied from the secondary battery to a current generating unit. A remaining amount detection unit for measuring the remaining amount of the secondary battery;
A rectifying unit for stepping down, rectifying and smoothing alternating current supplied from a commercial power source;
A power management unit that activates the rectifying unit to switch a current supplied to the current generation unit from a solar cell to a commercial power source when the remaining amount of the secondary battery measured by the remaining amount detection unit is equal to or less than a predetermined value; The plant growing system according to claim 6, further comprising: While having a plurality of growth surfaces and LED units, it has a plurality of current generating means corresponding to each LED unit,
The plant growing system according to claim 6 or 7, comprising a plurality of solar cells corresponding to each current generating means. It further has an entry / exit detection means for detecting the entry / exit of the worker into the plant breeding building,
When the entrance / exit detection means detects the entry of the worker into the plant growing building, the voltage determination means determines the voltage of the current applied to each color LED such that the LED unit emits white light. ,
When the entry / exit detection means detects the worker leaving the plant growth building, the voltage determination means is again based on the information detected by the plant growth state detection means, the red LED, blue LED, green The plant growing system according to any one of claims 1 to 8, wherein a voltage of a current applied to each of the LEDs is determined.

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